Data transmission protocol for transparent transmission forward and reverse isolating device

Abstract

The invention discloses a data transmission protocol for a transparent transmission forward and reverse isolating device. The steps are as follows: equipment deployment of a station control layer: a communication link is established, a production control area is deployed at an internal network control machine, an information management area at deployed in an external network industrial control machine, the middle is the forward and reverse isolating device, and a data center displays data monitoring on in-station equipment; data collection: the internal network industrial control machine implements the data collection on the in-station equipment, is docked successfully to assemble received data into a data packet with a self-defined format through a client, and transmits to the external network industrial control machine via the isolating device, and a server in the external network control machine analyzes the data packet into corresponding data; and reverse control: the data center sends a control instruction according to a special condition, assembles the data packet via the server of the external network industrial control machine, and transmits reverse single bytes to the internal network machine, thereby implementing response control. When a data or communication anomaly occurs, an external terminal can send a restart instruction, so that internal terminal equipment performs self-checking and restarts; and a forward data business is encapsulated. Therefore, the data transmission protocol is relatively safe and efficient.

Description

technical field [0001] The invention relates to the technical field of information communication of the secondary system of a photovoltaic power station, in particular to a data transmission protocol for a transparent forward and reverse isolation device. Background technique [0002] The power secondary system includes a power monitoring system for monitoring and controlling the power grid and power plant production and operation process, a business processing system based on computer and network technology, and intelligent equipment, as well as a dedicated wide-area data network for power dispatching at all levels, and a dedicated dial-up network for power production. [0003] The "Regulations on the Safety Protection of the Secondary Power System" clearly requires that the safety protection of the power secondary system should adhere to the principles of security partition, network dedicated, horizontal isolation, and vertical authentication to ensure the safety of the pow...

AI Technical Summary

Problems solved by technology

[0004] The forward and reverse isolation device effectively realizes the controllability and security of the power communication network, and improves the information security level of defense against computer attacks and viruses. However, this communication model with strong security and physical isolation also brings power data communication. Inconvenience in business, such as the inability to detect the operation of equipment in the production control area when the business data is not refreshed for a long time

At the same time, the communication model of strong security physical isolation is often applied to wide-area data networks with large geographical spans, and it is very difficult to maintain data at both ends of the dedicated horizontal one-way security isolation device, especially the internal network side of the isolation device

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